Reciprocating motor.



W. H. KELLER & S. D. SIBLEY. REOIPROGATING MOTOR. APPLICATION FILED JUNE17, 1908..

1,043,320, I Patented Nov. 5, 1912.

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W. H. KELLER & S. D. SIBLEY.

REGIPROGATIN G MOTOR. APPLICATION FILED JUNE 17, 1908.

Patented N0v.5, 1912.

2 SHEBTS-SEEET 2.

COLUMBIA. PLANuullAPn $0.. WASHINGTON. u. c.

WILLIAM H. KELLER ASSIGNORS TO KELLER-SIIBLEY ELECTRIC DRILL WESTVIRGINIA.

AND SAMUEL D. SIIBLEY, 0F CONNELLSVILLE, PENNSYLVANIA,

COMPANY, A CORPORATION OF RECIPROCATING MOTOR.

Specification of Letters Patent.

Patented Nov. 5, 1912.

Application filed June 17, 1908. Serial "No. 438,992.

To all whom it may concern:

Be it known that we, WVILLIAM H. KELLER and SAMUEL D. SIBLEY, citizensof the United States, residing at Co-nnellsville, in the county ofFayette and State of Pennsylvania, have invented certain new and usefulImprovements in Reciprocating Motors, of which the following is aspecification.

This invention relates to reciprocating motors and is especially adaptedfor use in connection with drills, punches, hammers or other impacttools and particularly where such devices are used for drilling orpunclr ing in rock, coal or any similar uses.

he main object of the invention is to provide means whereby rotarymotion and a magnetic pull cooperate to produce motion parallel to oraxially of the axis of rotation.

Ancillary objects of the invention will appear hereinafter.

In the accompanying drawings which illustrate the invention, Figure 1 isa side elevation of apparatus embodying the invention, partly brokenaway and partly in section; Fig. 2 is a top plan view of the apparatusshown in Fig. 1; Fig. 3 is an enlarged side elevation, with the casingremoved, of that portion of the apparatus whereby the rotary motion iscombined with the magnetic pull to produce motion as before described.Fig. 4 is a section on the line 1-4 of Figs. 1 and 3 looking toward theright, this figure being on the same scale as Fig. 3. Fig. 5 is a viewof a detail showing the ole face of the magnet; Fig. 6 is a perspectiveview of one end of a member to which the magnet is secured, and Fig. 7is an end view of a collar as will be referred to hereinafter.

Referring to the drawings, a frame, comprising the spiders A and B andthe heads G and I), which are secured and spaced by the longitudinalrods E, F and G, is sustained by means of the brackets H, I and K whichare adapted to slide upon longitudinalrods L and M which are parts of asupport, which support is shown as comprising the end pieces tudinalpieces P and Q. The frame, is thus movable with relation to thesupportand to effect this movement a screw R is rotatably mounted in thesupport and its screw threads engage with screw threads provided in thebracket I, so that as the screw is turned by N and O and the longi anysuitable means as a crank S, the frame is moved along the support. Thissupport may be mounted in any suitable manner for the purposes in vieRotatably mounted in suitable bearings 1 and 2 in the spiders A and B,is a shaft 3. This shaft is rotated by an electric motor a which ismounted on the head D and is therefore carried with the frame as it isfed in one direction or the other by the turning of the screw R. Uponthe motor shaft is fixed a gear 5 which meshes with a gear 6. The gear 6is fixed upon a shaft 7 which at one end enters a bearing 8 in theframe. The other end of the shaft 7 is square in section and enterswithin a cavity 9, bored into the end of the shaft 3, through a squarehole 10 in the collar 11 which is fixed upon the shaft 3 in any suitablemanner as by a transverse key 12. A longitudinal key 13 may also beemployed if thought advisable. This con nection between the shafts 7 and3 permits them to have relative axial movement but prevents themfromhaving rotary move ment with relation to each other. Of course theresult as described could be secured by making the shaft 7 other thansquare in section. It will be seen that the gear 6 is larger than thegear 5 and that therefore the shafts 7 and 3 revolve at a slower speedthan the shaft of the motor. It is desirable that a reducing gear beemployed asitpermits of the use of a small high speed motor withoutproducing undue speed in the shaft 3 and where a high speed of the shaft3 is not objectionable or a low speed motor is employed reducing gear isnot necessary.

To produce axial movement of the shaft 3, an inclined iron disk 14 isfixed upon the shaft and by reason of the inclination of the disk itwill be seen that the magnetic material of which it is composed isdisplaced longitudinally as well as circumferentially of the shaft. Theperiphery 15 of the disk is concentric with the shaft and facing thisperiphery is the pole face 16 of a magnet which is secured to the framehereinbefore referred to. This magnet is an electromagnet comprising thecoil 17 which encircles the core 18 upon which the pole face 16 isformed. This core is secured at one end to the bottom end of the lowestarm of the spider A. At the other end, the core 18 is secured by boltsor screws as 19 to one end of a member 20 which, at its other end, is

secured to the lowest arm of the spider B. When electric currentissupplied to the coil 17 or, in other words, it is energized, a magneticflux will pass through the core 18 and, emanating from the pole face 16will pass to the periphery of the inclined disk 14 and thus through thedisk to the shaft 3. If the spider A is of iron, the flux will then passthrough its lowest arm to the core 18 when the magnetic circuit will becompleted. In order that the magnetic flux may not be shunted offthrough the frame from the disk 14, the member 20 is preferably ofnon-magnetic material such as brass. Also, where the spider A is not ofiron or is of hard cast iron, if such is the case it is desirable toemploy a wiper or arm 21 of magnetic material. This wiper at one endbears against the core 18 and at the other end is in close proximity toand may even bear against the shaft 3. The wiper is inclined inwardly asshown so that its upper end approaches the disk lt as near as possibleso that the magnetic path through the shaft is shortened. lVhere theshaft is of steel or hard iron this will materially reduce thereluctance of the magnetic circuit. The wiper, the disk and the core 18may be made of relatively soft iron. The wiper 21 is preferably formedof laminations 22 which are clamped between side plates 23 and 2st bymeans of screws 25, it being secured at its lower end by any suitablemeans as a screw 26, while at its upper end it may be hollowed out asshown for the reception of the shaft 3. The lamination of the wiperprevents the formation of eddy currents therein as the shaft 3 rotates.In order to fix the magnetic flux between the pole face 16 and theperiphery of the disk, in position, awinding 26 in the pole face isprovided which winding is shown as consisting of a grid of copper letinto slots in the pole face. This operates in a well-known manner tooppose any shifting of the field and this prevents cross pulling of themagnet, side sliding and laggmg.

It will be understood that the magnet coil 17 is suitably connected witha source of electric current and that a suitable switch is provided formaking or breaking its circuit so that it may be energized ordeenergized at will.

The electric motor 4 may be of any suitable and well-known constructionand it will be understood that it is suitably connected with a source ofcurrent and that suitable means for starting, stopping or otherwisecontrolling it are provided.

Upon the frame may be placed a suitable inclosing casing 27 forprotecting the mechanism and in this casing may be provided suitabledoors as 28 and 29 whereby hand holes are provided through which themechanism may be reached for attending to lubrication or for otherpurposes in the apparatus shown the door 28 being alongside the coil 17while the door 29 is adjacent to the gears 5 and 6 and the slidingconnection between the shafts 3 and 7.

At one end of the shaft 3 (see Fig. 1) may be mounted a chuck 30 forholding the drill or other tool.

It is clear from the foregoing that the brackets, H, I and K, the motor4., the casing 27 and the frame therefor, which frame comprises thespiders A and B and the heads C and D, move together, in one unitarystructure, with respect to the rectangular frame comprising the piecesP. O. Q. N this rectangular frame being stationary during the operationof the apparatus in one location and supported in any suitable manner asby beams or posts P and P The parts being in the position as indicatedin full lines in Fig. 3, the shaft 3 will be at the extreme left handlimit of its movement. It being understood that the magnet coil 17 issupplied with current and that therefore the magnet 18 is energized, asthe shaft 3 is revolved by the motor 4 through the instrumentality ofthe gears, the periphery of the disk lat will he at tracted to the poleface of the magnet 18 and by reason of the fact that the successiveport-ions of the periphery which. are presented to the pole face areaxially displaced along the shaft, the rotary movement of the shaft willbe converted into axial movement thereof. lVhen the shaft 3 and disk 4have revolved through 180 the disk will occupy the position as indicatedby dotted lines in Fig. 3 when the shaft 3 will have been moved axiallyinto its farthermost right hand position. As the rotation of the shaftis continued itwill be axially moved back toward the left hand untilwhen a complete revolution has been made the disk will occupy itsoriginal position as shown in full lines and the shaft will havereciprocated axially from its extreme left hand to its extreme righthand position and back again. The rotation of the shaft 3 beingcontinued, the cycle of operations just referred to will be repeated andit will be obvious that during the continuous rotation of the shaft aseries of axial movements of the shaft will be caused and the drill orother tool will be alternately driven forward and retracted so long asthe shaft 3 continues to rotate and the magnet 18 is sufficientlyenergized. The operation of the disk and magnet upon the shaft 3 issomewhat analogous to that of a cam.

A similar reciprocating movement to that produced by the apparatus shownmight be accomplished by causing the path of one side of the disk to befixed by causing it to enter within. a groove instead of having its pathfixed by magnetic attraction as in the apparatus shown. With such amechanical. arrangement, however, if, in the case of drilling, the drillshould become jammed as by coming against hard slate in drilling coal,the parts would either break or else the apparatus would be brought to astop. A stoppage of this kind would be liable to result in the burningout of the driving motor as 4; or the blowing of a fuse orcircuitbreaker. By employing a magnet interlinkage or arrangement forsecuring the axial movement of the shaft, this disadvantage is avoidedfor while the magnetism is sufiiciently strong to hold the parts inoperative relation during normal operation, in cases of emergency suchas that just alluded to the parts can have relative movement and preventjamming, breaking, burning out of the motor or the blowing of fuses orcircuitbreakers. It will further be observed that the operation ofapparatus embodying hc present invention is easily controlled. y done bydepriving the coil 17 of its supply of current, the shaft 3 may berevolved without reciprocation.

While the invention has been shown in what is considered its bestembodiment, the structure shown may be changed in nu merous ways andstill be within the scope of the appended claims. The inventiontherefore may be embodied, without departing from its spirit, in otherstructures than that shown in the drawing and is not, therefore, limitedto the structure illustrated in the drawing.

What we claim is:

1. In a reciprocating motor, the combination with a rotatable shaft, ofmeans for rotating said shaft, magnetic means adapted to produce a pullcooperating with the motion of rotation for moving said shaft inopposite directions along its axis as it is continuously rotated.

2. In a reciprocating motor, the combination with a rotatable shaft, ofa disk thereon inclined thereto and a magnet adapted to attract saiddisk to move the shaft axially as it is rotated.

3. In a reciprocating motor, the combination with a rotatable shaft, ofa disk thereon inclined thereto and a magnet adapted to attract saiddisk to axially reciprocate sai shaft as it is rotated.

4. In a reciprocating motor, the combination with a rotatable shaft, ofmeans for rotating the same, a disk upon said shaft inclined thereto anda magnet adapted to attract said disk and move the shaft axially as itis rotated.

5. In a reciprocating motor, the combination with a rotatable shaft, ofa disk thereon inclined thereto, means for rotating said shaft and amagnet adapted to attract said denergizing the magnet 1 8 which can bedisk and axially reciprocate the shaft as it is rotated.

6. In a reciprocating motor, the combination with a rotatable shaft, ofmeans for rotating said shaft, magnetic material mounted upon said shaftand displaced circumferentially and axially thereof and a magnet adaptedto attract said magnetic material to move the shaft axially as it isrotated, said magnet acting successively upon circumferentially andaxially displaced portions of said material.

7. In a reciprocating motor, the combination with a rotatable shaft, ofmeans for rotating said shaft, magnetic material. mounted upon saidshaft and displaced circumferentially and axially thereof and a magnetadapted to attract said magnetic material to axially reciprocate theshaft, said magnet acting successively upon axially andcircumferentially displaced portions of said material.

8. The combination with a frame, of a shaft rotatably mounted therein,means can riedby said frame for rotating said shaft, magnetic meanscooperating with the rotary motion of said shaft to produce axialmovement of the same and means for feeding said frame parallel to theaxis of said shaft.

9. The combination with a frame, of a shaft rotatably mounted therein,an electric motor carried by said frame for rotating said shaft,magnetic means cooperating with the rotary motion of said shaft toproduce axial movement of the same and means for feeding said frameparallel to the axis of said shaft.

10. The combination with a frame, of a shaft rotatably mounted therein,a motor carried by said frame, a disk upon said shaft and inclinedthereto, a magnet mounted upon said frame and adapted to attract saiddisk and means for feeding said frame parallel to the axis of saidshaft.

11. The combination with a frame, of a support therefor, said framebeing movable upon said support, means for moving said frame withrelation to the support, a shaft rotatably mounted in said frame, amotor carried by said frame for rotating said shaft, and magnetic meanscooperating with the rotary motion of said shaft to produce axialmovement of the same.

12. In a reciprocating motor, the combi nation with a rotatable shaft,of a disk thereon and inclined thereto having its peripheral faceconcentric to the axis of said shaft, a magnet having a pole face facingthe periphery of said disk and parallel thereto and means for rotatingsaid shaft.

13. In a reciprocating motor, the combination with a rotatable shaft, ofmeans for rotating the same, a disk upon said shaft and inclined theretoand a magnet having a pole face facing the periphery of said disk andmeans for fixing the location of the magnetic flux between said disk andpole face.

14. In a reciprocating motor, the combination with a rotatable shaft, ofmeans for rotating the same, a disk upon said shaft and inclinedthereto, a magnet having a pole face facing the periphery of said diskand windings in said pole face.

15. In a reciprocating motor, the combination with a rotatable shaft, ofan impact tool, means for continuously rotating said shaft and magneticmeans adapted to produce a magnetic pull cooperating with the continuousmotion of rotation of said shaftto move said tool against the work in aseries of blows.

16. The combination, with a rotatable shaft, of means for rotating saidshaft, a magnetic member adapted to exert a pull I which cooperates withthe rotary motion of i said shaft to relatively move said member andshaft in opposite di 'ections, and means for producing magnetism in saidmember.

17. The combination, with an impact tool of a rotatable shaft, means forrotating said shaft, magnetic material projecting laterally from saidshaft and circumferentially and longitudinally displaced thereon andmeans for producing magnetism through said material, whereby said toolis reciprocated as said shaft rotates, said magnetism actingsuccessively upon portions of said material which are circumferentiallyand axially displaced.

18. The combination with a rotatable shaft, of means for rotating saidshaft, a disk upon. said shaft and inclined to the axis thereof, amagnetic member adapted to exert a pull upon said disk, which pullcooperates with the rotary motion of said shaft to produce relativelongitudinal movement of said shaft and said member, and means forproducing magnetism in said member and said disk.

19. The combination with a rotatable shaft of means for rotating saidshaft, magnetic material upon said shaft, projecting laterallytherefrom, and being circumferentially and longitudinally displacedthereon, a magnetic member adapted to successively attract portions ofsaid material which are axially and circumferentially displaced uponsaid shaft and thereby to cooperate with the rotary motion of said shaftto produce relat-ive longitudinal movement of said shaft and said memberand means for producing magnetism in said member and said material.

In testimony whereof we affix our signatures, in presence of twowitnesses.

XVILLIAM H. KELLER. SAMUEL D. SIBLEY. WVitnesses WV. M. lVEBER, MARTINGILLEY.

Copies of this patent may b obtained for five cents each, by addressingthe Commissioner of Patents- Washington, D. C.

